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American Journal of Epidemiology Advance Access published online on August 11, 2006
American Journal of Epidemiology, doi:10.1093/aje/kwj258
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American Journal of Epidemiology Copyright © 2006 by the Johns Hopkins Bloomberg School of Public Health All rights reserved; printed in U.S.A.
Received August 11, 2005
Accepted March 24, 2006

ORIGINAL CONTRIBUTIONS

Protective Association between Nonsteroidal Antiinflammatory Drug Use and Measures of Benign Prostatic Hyperplasia

Jennifer L. St. Sauver 1 *, Debra J. Jacobson 2, Michaela E. McGree 2, Michael M. Lieber 3, and Steven J. Jacobsen 4

1 Division of Epidemiology, Mayo Clinic College of Medicine, Rochester, MN
2 Division of Biostatistics, Mayo Clinic College of Medicine, Rochester, MN
3 Department of Urology, Mayo Clinic College of Medicine, Rochester, MN
4 Research and Evaluation, Southern California Permanente Medical Group, Pasadena, CA

* To whom correspondence should be addressed.
Jennifer L. St. Sauver, E-mail: stsauver.jennifer{at}mayo.edu


  Abstract

In 1990-2002, the authors conducted a population-based cohort study of 2,447 Caucasian men in Olmsted County, Minnesota, to determine whether daily users of nonsteroidal antiinflammatory drugs (NSAIDs) were at lower risk than nondaily NSAID users of developing benign prostatic hyperplasia. Participants completed validated questionnaires during a home visit, including information about daily NSAID use. A random subset of 634 men also participated in a clinical evaluation including transrectal ultrasonography and assessment of serum prostate-specific antigen levels. Examinations and questionnaires were repeated biennially through 2002. Benign prostatic hyperplasia measures included development of moderate/severe urinary symptoms (American Urological Association Symptom Index score >7), low maximum urinary flow rate (<12 ml/second), prostate volume >30 ml, or prostate-specific antigen level >1.4 ng/ml. After adjustment for age, daily NSAID use was inversely associated with onset of moderate/severe urinary symptoms (hazard ratio (HR) = 0.73, 95% confidence interval (CI): 0.64, 0.82), low maximum flow rate (HR = 0.51, 95% CI: 0.43, 0.61), increased prostate volume (HR = 0.53, 95% CI: 0.41, 0.68), and elevated prostate-specific antigen level (HR = 0.52, 95% CI: 0.40, 0.68). In age-specific analyses, inverse associations between NSAID use and urinary measures tended to be stronger in the oldest age groups, although this interaction was statistically significant for only obstructive symptoms and treatment. Results suggest that NSAID use may prevent or delay development of benign prostatic hyperplasia.

Keywords: anti-inflammatory agents, non-steroidal; cohort studies; data collection; men; prostate-specific antigen; prostatic hyperplasia; questionnaires.
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